Waldemar Janicki - PhD in technical sciences (The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences 2013), MSc in electrical engineering: energoelectronics (Gdansk University of Technology 1998). Working in IFFM PAS since 1998. Initially as data acquisition and analysis specialist, as well as electrical engineer, shortly afterwards involved in other projects which required also developing or using automated control systems, including those applied in some hydropower plants. Expert in the field of discharge measurement in hydropower installations. Experience in numerous power plants in Europe (Poland and Balkan states) and Latin America (Mexico). Author of original contribution to increasing accuracy of the pressure-time method by introducing the effects of compressibility (method characteristics, PhD thesis). Author or co-author of numerous papers on hydraulic machinery performance test methodology.